Lately I am receiving a lot of Spams originating within MS networks with attached PDF's that basically contain an image with a link.

The body of the message is 7-8 random words such as: moka bu fyno da zosi ku xiqy zy

These prove particularly difficult to filter and I'm thinking maybe running the PDF's links through the phishing checks might help.

Is that possible or does anyone have other solutions for these messages ?

Thanks!